André, Marcel and Patrick Warfsmann are ammunition searchers. Using sensitive technology, they comb the fine sand on the beach of Wangerooge centimeter by centimeter, looking for metal. They do this because the metal they find can be very dangerous. 
Once they’ve found something, they carefully dig it out. Only then can they see whether it’s wartime ammunition. If it is, a complex salvage operation follows. People from the Explosive Ordnance Disposal Service move in, defusing these relics from bygone times.